Huntington's disease (HD) is a slowly progressive disorder that devastates the lives of those affected and their families. There are no treatments that slow the progression of HD, only mildly effective symptomatic therapies are available.Creatine monohydrate is considered a nutritional supplement. The purpose of CREST-E is to test whether high-dose creatine can slow the progressive functional decline that occurs in persons 18 years or older with early clinical features of HD. The long-term safety, tolerability and effectiveness of up to 40 grams daily creatine compared to placebo is studied. A variety of biological processes are assessed for markers of disease activity or progression and creatine effects. Up to 50 active research centers globally will enroll 650 subjects.

Up to 40 grams daily, powder form creatine monohydrate, taken for the trial duration

Other Name: HD-02

Placebo Comparator: B

Randomized to receive placebo (up to 40 grams daily)

Drug: Placebo

Up to 40 grams daily, powder form placebo (inactive substance), taken for the trial duration

Other Name: Dextrose

Eligibility

Ages Eligible for Study:

18 Years and older

Genders Eligible for Study:

Both

Accepts Healthy Volunteers:

No

Criteria

Inclusion Criteria:

Male or female ages 18 or older.

Clinical features of HD AND confirmatory family history of HD; OR Clinical features of HD AND CAG repeat expansion greater or equal to 36.

Stage I or II of illness (TFC greater or equal to 7).

Ambulatory and not requiring skilled nursing care at the time of enrollment.

Must be capable of providing informed consent and complying with trial procedures.

Additional inclusion criteria apply.

Exclusion Criteria:

History of known sensitivity or intolerability to creatine monohydrate.

Exposure to any investigational drug within 30 days of randomization (Baseline visit).

Use of supplemental creatine at a dose greater than 10 grams within 30 days of randomization (Baseline visit).

Screening laboratory abnormalities that in the judgment of the investigator would jeopardize safe conduct of study.

Clinical evidence of unstable medical illness.

Clinical evidence of unstable psychiatric illness.

Additional exclusion criteria apply.

Contacts and Locations

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study.
To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.
For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00712426